/* radio-trust.c - Trust FM Radio card driver for Linux 2.2 * by Eric Lammerts <eric@scintilla.utwente.nl> * * Based on radio-aztech.c. Original notes: * * Adapted to support the Video for Linux API by * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by: * * Quay Ly * Donald Song * Jason Lewis (jlewis@twilight.vtc.vsc.edu) * Scott McGrath (smcgrath@twilight.vtc.vsc.edu) * William McGrath (wmcgrath@twilight.vtc.vsc.edu) * * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> */ #include <stdarg.h> #include <linux/module.h> #include <linux/init.h> #include <linux/ioport.h> #include <asm/io.h> #include <asm/uaccess.h> #include <linux/videodev2.h> #include <media/v4l2-common.h> #include <linux/version.h> /* for KERNEL_VERSION MACRO */ #define RADIO_VERSION KERNEL_VERSION(0,0,2) static struct v4l2_queryctrl radio_qctrl[] = { { .id = V4L2_CID_AUDIO_MUTE, .name = "Mute", .minimum = 0, .maximum = 1, .default_value = 1, .type = V4L2_CTRL_TYPE_BOOLEAN, },{ .id = V4L2_CID_AUDIO_VOLUME, .name = "Volume", .minimum = 0, .maximum = 65535, .step = 2048, .default_value = 65535, .type = V4L2_CTRL_TYPE_INTEGER, },{ .id = V4L2_CID_AUDIO_BASS, .name = "Bass", .minimum = 0, .maximum = 65535, .step = 4370, .default_value = 32768, .type = V4L2_CTRL_TYPE_INTEGER, },{ .id = V4L2_CID_AUDIO_TREBLE, .name = "Treble", .minimum = 0, .maximum = 65535, .step = 4370, .default_value = 32768, .type = V4L2_CTRL_TYPE_INTEGER, }, }; /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */ #ifndef CONFIG_RADIO_TRUST_PORT #define CONFIG_RADIO_TRUST_PORT -1 #endif static int io = CONFIG_RADIO_TRUST_PORT; static int radio_nr = -1; static int ioval = 0xf; static __u16 curvol; static __u16 curbass; static __u16 curtreble; static unsigned long curfreq; static int curstereo; static int curmute; /* i2c addresses */ #define TDA7318_ADDR 0x88 #define TSA6060T_ADDR 0xc4 #define TR_DELAY do { inb(io); inb(io); inb(io); } while(0) #define TR_SET_SCL outb(ioval |= 2, io) #define TR_CLR_SCL outb(ioval &= 0xfd, io) #define TR_SET_SDA outb(ioval |= 1, io) #define TR_CLR_SDA outb(ioval &= 0xfe, io) static void write_i2c(int n, ...) { unsigned char val, mask; va_list args; va_start(args, n); /* start condition */ TR_SET_SDA; TR_SET_SCL; TR_DELAY; TR_CLR_SDA; TR_CLR_SCL; TR_DELAY; for(; n; n--) { val = va_arg(args, unsigned); for(mask = 0x80; mask; mask >>= 1) { if(val & mask) TR_SET_SDA; else TR_CLR_SDA; TR_SET_SCL; TR_DELAY; TR_CLR_SCL; TR_DELAY; } /* acknowledge bit */ TR_SET_SDA; TR_SET_SCL; TR_DELAY; TR_CLR_SCL; TR_DELAY; } /* stop condition */ TR_CLR_SDA; TR_DELAY; TR_SET_SCL; TR_DELAY; TR_SET_SDA; TR_DELAY; va_end(args); } static void tr_setvol(__u16 vol) { curvol = vol / 2048; write_i2c(2, TDA7318_ADDR, curvol ^ 0x1f); } static int basstreble2chip[15] = { 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8 }; static void tr_setbass(__u16 bass) { curbass = bass / 4370; write_i2c(2, TDA7318_ADDR, 0x60 | basstreble2chip[curbass]); } static void tr_settreble(__u16 treble) { curtreble = treble / 4370; write_i2c(2, TDA7318_ADDR, 0x70 | basstreble2chip[curtreble]); } static void tr_setstereo(int stereo) { curstereo = !!stereo; ioval = (ioval & 0xfb) | (!curstereo << 2); outb(ioval, io); } static void tr_setmute(int mute) { curmute = !!mute; ioval = (ioval & 0xf7) | (curmute << 3); outb(ioval, io); } static int tr_getsigstr(void) { int i, v; for(i = 0, v = 0; i < 100; i++) v |= inb(io); return (v & 1)? 0 : 0xffff; } static int tr_getstereo(void) { /* don't know how to determine it, just return the setting */ return curstereo; } static void tr_setfreq(unsigned long f) { f /= 160; /* Convert to 10 kHz units */ f += 1070; /* Add 10.7 MHz IF */ write_i2c(5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0); } static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *v) { strlcpy(v->driver, "radio-trust", sizeof(v->driver)); strlcpy(v->card, "Trust FM Radio", sizeof(v->card)); sprintf(v->bus_info, "ISA"); v->version = RADIO_VERSION; v->capabilities = V4L2_CAP_TUNER; return 0; } static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { if (v->index > 0) return -EINVAL; strcpy(v->name, "FM"); v->type = V4L2_TUNER_RADIO; v->rangelow = (87.5*16000); v->rangehigh = (108*16000); v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO; v->capability = V4L2_TUNER_CAP_LOW; if (tr_getstereo()) v->audmode = V4L2_TUNER_MODE_STEREO; else v->audmode = V4L2_TUNER_MODE_MONO; v->signal = tr_getsigstr(); return 0; } static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { if (v->index > 0) return -EINVAL; return 0; } static int vidioc_s_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { curfreq = f->frequency; tr_setfreq(curfreq); return 0; } static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { f->type = V4L2_TUNER_RADIO; f->frequency = curfreq; return 0; } static int vidioc_queryctrl(struct file *file, void *priv, struct v4l2_queryctrl *qc) { int i; for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { if (qc->id && qc->id == radio_qctrl[i].id) { memcpy(qc, &(radio_qctrl[i]), sizeof(*qc)); return 0; } } return -EINVAL; } static int vidioc_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: ctrl->value = curmute; return 0; case V4L2_CID_AUDIO_VOLUME: ctrl->value = curvol * 2048; return 0; case V4L2_CID_AUDIO_BASS: ctrl->value = curbass * 4370; return 0; case V4L2_CID_AUDIO_TREBLE: ctrl->value = curtreble * 4370; return 0; } return -EINVAL; } static int vidioc_s_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: tr_setmute(ctrl->value); return 0; case V4L2_CID_AUDIO_VOLUME: tr_setvol(ctrl->value); return 0; case V4L2_CID_AUDIO_BASS: tr_setbass(ctrl->value); return 0; case V4L2_CID_AUDIO_TREBLE: tr_settreble(ctrl->value); return 0; } return -EINVAL; } static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) { if (a->index > 1) return -EINVAL; strcpy(a->name, "Radio"); a->capability = V4L2_AUDCAP_STEREO; return 0; } static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) { *i = 0; return 0; } static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) { if (i != 0) return -EINVAL; return 0; } static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a) { if (a->index != 0) return -EINVAL; return 0; } static const struct file_operations trust_fops = { .owner = THIS_MODULE, .open = video_exclusive_open, .release = video_exclusive_release, .ioctl = video_ioctl2, .compat_ioctl = v4l_compat_ioctl32, .llseek = no_llseek, }; static struct video_device trust_radio= { .owner = THIS_MODULE, .name = "Trust FM Radio", .type = VID_TYPE_TUNER, .hardware = 0, .fops = &trust_fops, .vidioc_querycap = vidioc_querycap, .vidioc_g_tuner = vidioc_g_tuner, .vidioc_s_tuner = vidioc_s_tuner, .vidioc_g_frequency = vidioc_g_frequency, .vidioc_s_frequency = vidioc_s_frequency, .vidioc_queryctrl = vidioc_queryctrl, .vidioc_g_ctrl = vidioc_g_ctrl, .vidioc_s_ctrl = vidioc_s_ctrl, .vidioc_g_audio = vidioc_g_audio, .vidioc_s_audio = vidioc_s_audio, .vidioc_g_input = vidioc_g_input, .vidioc_s_input = vidioc_s_input, }; static int __init trust_init(void) { if(io == -1) { printk(KERN_ERR "You must set an I/O address with io=0x???\n"); return -EINVAL; } if(!request_region(io, 2, "Trust FM Radio")) { printk(KERN_ERR "trust: port 0x%x already in use\n", io); return -EBUSY; } if(video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr)==-1) { release_region(io, 2); return -EINVAL; } printk(KERN_INFO "Trust FM Radio card driver v1.0.\n"); write_i2c(2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */ write_i2c(2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */ write_i2c(2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */ write_i2c(2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */ write_i2c(2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */ tr_setvol(0x8000); tr_setbass(0x8000); tr_settreble(0x8000); tr_setstereo(1); /* mute card - prevents noisy bootups */ tr_setmute(1); return 0; } MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); MODULE_DESCRIPTION("A driver for the Trust FM Radio card."); MODULE_LICENSE("GPL"); module_param(io, int, 0); MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)"); module_param(radio_nr, int, 0); static void __exit cleanup_trust_module(void) { video_unregister_device(&trust_radio); release_region(io, 2); } module_init(trust_init); module_exit(cleanup_trust_module);